Today is the 15th birthday of the first trilogy of the classic Commander Keen: Invasion of the Vorticons!

Our team was super small when we created these three games: John Carmack, Tom Hall and myself. Adrian Carmack came in near the end to do some art touch-up but the majority of the art was Tom Hall's. It took us three months of working at night after our day job (where we were making games all day) and December 14, 1990 it was uploaded to the Software Creations BBS and exploded all over the world overnight! After we received our first royalty check one month later we officially quit Softdisk and started id Software.